Part A
AD9146BCPZ
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 2038 個数
- Package
- LFCSP-48
- Series
- データ取得 - デジタル/アナログコンバータ (DAC)
Replacement verdict
Compatible functional replacement candidate
The AD9144BCPAZRL is a higher-performance, pin-compatible upgrade candidate for the AD9146BCPZ, offering the same 16-bit dual-channel DAC architecture and 72-lead LFCSP footprint while doubling the maximum update rate to 2.8 GSPS. Designers should validate the increased power envelope and JESD204B lane configuration against their existing thermal and interface budgets before adopting it as a drop-in substitute.
Resolution and Channel Count
High match
Package and Pinout
High match
Maximum Sample Rate
Validation required
Power Consumption
Validation required
Parts at a glance
Part B
AD9144BCPAZRL
テキサス・インスツルメンツ
- Lifecycle
- Active
- Stock
- 5659 個数
- Package
- VFQFN-88
- Series
- データ取得 - デジタル/アナログコンバータ (DAC)
Key differences
Rows are prioritized by design impact. Highlighted values require attention during substitution.
Key electrical and mechanical differences between the two devices
| Parameter | AD9146BCPZ | AD9144BCPAZRL | Why it matters |
|---|---|---|---|
| Resolution (DAC bits) | 16 | 16 | Bit depth determines the quantization noise floor and achievable dynamic range of the synthesized signal. |
| Number of DAC Channels | 2 | 4 | Channel count determines how many independent transmit paths can be driven from a single device, affecting system architecture and board space. |
| Maximum Update Rate | 1230 MSPS | 2800 MSPS | The DAC update rate sets the maximum synthesizable signal bandwidth and the achievable oversampling ratio for the transmit chain. |
| JESD204B Lane Rate / Interface | JESD204B, up to 3.125 Gbps per lane | JESD204B, up to 12.5 Gbps per lane | The serial lane rate and interface standard determine the digital input bandwidth and compatibility with the driving FPGA/ASIC serializer. |
| Package / Pin Count | 72-lead LFCSP | 88-lead LFCSP | Package and pin count affect PCB footprint, layout, and whether the parts are drop-in compatible on an existing board. |
| Supply Voltage (Analog/Digital) | 1.8 V / 3.3 V | 1.8 V / 3.3 V | Supply rails must match the board power design; differing rails would require additional regulators or level shifting. |
| Operating Temperature Range | -40 °C to +85 °C | -40 °C to +85 °C | The temperature range determines suitability for industrial versus commercial environments and thermal design margins. |
| On-chip Interpolation / NCO | 2x/4x/8x interpolation, digital NCO | 2x/4x/8x/16x interpolation, digital NCO | Interpolation and NCO features shift the digital signal to the target RF band and reduce the required input data rate from the host. |
Need help validating a replacement?
Send your BOM and application constraints for technical and sourcing review.
Full specification comparison
Use manufacturer datasheets as the final authority.
| Specification | AD9146BCPZ | AD9144BCPAZRL |
|---|---|---|
| Supplier | - | Analog Devices Inc. |
| Series | TxDAC+® | TxDAC+® |
| Part Status | Active | Active |
| Number of Bits | 16 | 16 |
| Number of D/A Converters | 2 | 4 |
| Settling Time | 20ns (Typ) | 20ns (Typ) |
| Output Type | Current - Unbuffered | Current - Unbuffered |
| Differential Output | Yes | Yes |
| Data Interface | LVDS - Parallel | JESD204B |
| Reference Type | External, Internal | Internal |
| Voltage - Supply, Analog | 3.13V ~ 3.47V | 3.13V ~ 3.47V |
| Voltage - Supply, Digital | 1.71V ~ 1.89V | 1.14V ~ 1.26V |
| INL / DNL(LSB) | ±3.7, ±2.1 | ±2, ±1 |
| Architecture | Current Source | Oversampling Interpolating DAC |
| Operating Temperature | -40°C ~ 85°C | -40°C ~ 85°C |
Frequently asked questions
What are the key differences between the AD9146BCPZ and the AD9144BCPAZRL?
The AD9146BCPZ is a dual 16-bit, 123 MSPS TxDAC+ digital-to-analog converter, while the AD9144BCPAZRL is a quad 16-bit, 2.8 GSPS DAC. The AD9144 offers significantly higher sample rate and channel density, making it suited for wideband multi-channel transmit applications, whereas the AD9146 targets lower-speed dual-channel designs.
Are the AD9146BCPZ and AD9144BCPAZRL pin-compatible?
No. The AD9146BCPZ is supplied in a 48-lead LFCSP package, and the AD9144BCPAZRL is supplied in an 88-lead LFCSP package. The different package sizes, pin counts, and pin functions preclude direct pin-to-pin substitution.
What are the resolution and channel count specifications for each device?
Both devices provide 16-bit DAC resolution. The AD9146BCPZ integrates two DAC channels, while the AD9144BCPAZRL integrates four DAC channels, allowing the AD9144 to support higher channel-count transmit architectures.
How do the maximum sample rates of the two DACs compare?
The AD9146BCPZ supports a maximum update rate of 123 MSPS. The AD9144BCPAZRL supports a maximum sample rate of 2.8 GSPS, which is substantially higher and enables direct RF synthesis at wider bandwidths.
Do both parts support a JESD204B serial interface?
Yes. Both the AD9146BCPZ and the AD9144BCPAZRL include a JESD204B-compatible serial input interface, reducing pin count and simplifying high-speed digital interfacing compared with parallel LVDS inputs.
What are the typical supply voltage requirements for these DACs?
Both devices operate from a 1.8 V digital and analog supply core with additional supply rails for the output stage, consistent with the Analog Devices TxDAC+ family architecture. Designers should confirm exact rail tolerances and sequencing from the respective datasheets.
Which device is better suited for wideband multi-channel transmit systems?
The AD9144BCPAZRL is better suited for wideband multi-channel transmit systems because its 2.8 GSPS sample rate and four integrated DAC channels support wider instantaneous bandwidth and higher channel density than the AD9146BCPZ, which is limited to 123 MSPS and two channels.